Mercurial > hg > orthanc
annotate Core/Lua/LuaFunctionCall.cpp @ 1448:3f7722179467
refactoring: GetJson in Lua
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Thu, 02 Jul 2015 09:10:25 +0200 |
| parents | 6e7e5ed91c2d |
| children | 905842836ad4 |
| rev | line source |
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| 386 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
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3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
| 386 | 5 * |
| 6 * This program is free software: you can redistribute it and/or | |
| 7 * modify it under the terms of the GNU General Public License as | |
| 8 * published by the Free Software Foundation, either version 3 of the | |
| 9 * License, or (at your option) any later version. | |
| 10 * | |
| 11 * In addition, as a special exception, the copyright holders of this | |
| 12 * program give permission to link the code of its release with the | |
| 13 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
| 14 * that use the same license as the "OpenSSL" library), and distribute | |
| 15 * the linked executables. You must obey the GNU General Public License | |
| 16 * in all respects for all of the code used other than "OpenSSL". If you | |
| 17 * modify file(s) with this exception, you may extend this exception to | |
| 18 * your version of the file(s), but you are not obligated to do so. If | |
| 19 * you do not wish to do so, delete this exception statement from your | |
| 20 * version. If you delete this exception statement from all source files | |
| 21 * in the program, then also delete it here. | |
| 22 * | |
| 23 * This program is distributed in the hope that it will be useful, but | |
| 24 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 26 * General Public License for more details. | |
| 27 * | |
| 28 * You should have received a copy of the GNU General Public License | |
| 29 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 30 **/ | |
| 31 | |
| 32 | |
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33 #include "../PrecompiledHeaders.h" |
| 386 | 34 #include "LuaFunctionCall.h" |
| 35 | |
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36 #include <cassert> |
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37 #include <stdio.h> |
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38 #include <boost/lexical_cast.hpp> |
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39 #include <glog/logging.h> |
| 386 | 40 |
| 41 namespace Orthanc | |
| 42 { | |
| 43 void LuaFunctionCall::CheckAlreadyExecuted() | |
| 44 { | |
| 45 if (isExecuted_) | |
| 46 { | |
| 47 throw LuaException("Arguments cannot be pushed after the function is executed"); | |
| 48 } | |
| 49 } | |
| 50 | |
| 51 LuaFunctionCall::LuaFunctionCall(LuaContext& context, | |
| 52 const char* functionName) : | |
| 53 context_(context), | |
| 54 isExecuted_(false) | |
| 55 { | |
| 56 // Clear the stack to fulfill the invariant | |
| 57 lua_settop(context_.lua_, 0); | |
| 58 lua_getglobal(context_.lua_, functionName); | |
| 59 } | |
| 60 | |
| 61 void LuaFunctionCall::PushString(const std::string& value) | |
| 62 { | |
| 63 CheckAlreadyExecuted(); | |
| 64 lua_pushstring(context_.lua_, value.c_str()); | |
| 65 } | |
| 66 | |
| 67 void LuaFunctionCall::PushBoolean(bool value) | |
| 68 { | |
| 69 CheckAlreadyExecuted(); | |
| 70 lua_pushboolean(context_.lua_, value); | |
| 71 } | |
| 72 | |
| 73 void LuaFunctionCall::PushInteger(int value) | |
| 74 { | |
| 75 CheckAlreadyExecuted(); | |
| 76 lua_pushinteger(context_.lua_, value); | |
| 77 } | |
| 78 | |
| 79 void LuaFunctionCall::PushDouble(double value) | |
| 80 { | |
| 81 CheckAlreadyExecuted(); | |
| 82 lua_pushnumber(context_.lua_, value); | |
| 83 } | |
| 84 | |
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85 void LuaFunctionCall::PushJson(const Json::Value& value) |
| 386 | 86 { |
| 87 CheckAlreadyExecuted(); | |
| 1051 | 88 context_.PushJson(value); |
| 386 | 89 } |
| 90 | |
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91 void LuaFunctionCall::ExecuteInternal(int numOutputs) |
| 386 | 92 { |
| 93 CheckAlreadyExecuted(); | |
| 94 | |
| 95 assert(lua_gettop(context_.lua_) >= 1); | |
| 96 int nargs = lua_gettop(context_.lua_) - 1; | |
| 97 int error = lua_pcall(context_.lua_, nargs, numOutputs, 0); | |
| 98 | |
| 99 if (error) | |
| 100 { | |
| 101 assert(lua_gettop(context_.lua_) >= 1); | |
| 102 | |
| 103 std::string description(lua_tostring(context_.lua_, -1)); | |
| 104 lua_pop(context_.lua_, 1); /* pop error message from the stack */ | |
| 105 throw LuaException(description); | |
| 106 } | |
| 107 | |
| 108 if (lua_gettop(context_.lua_) < numOutputs) | |
| 109 { | |
| 110 throw LuaException("The function does not give the expected number of outputs"); | |
| 111 } | |
| 112 | |
| 113 isExecuted_ = true; | |
| 114 } | |
| 115 | |
| 116 bool LuaFunctionCall::ExecutePredicate() | |
| 117 { | |
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118 ExecuteInternal(1); |
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119 |
| 386 | 120 if (!lua_isboolean(context_.lua_, 1)) |
| 121 { | |
| 122 throw LuaException("The function is not a predicate (only true/false outputs allowed)"); | |
| 123 } | |
| 124 | |
| 125 return lua_toboolean(context_.lua_, 1) != 0; | |
| 126 } | |
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127 |
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128 |
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129 void LuaFunctionCall::ExecuteToJson(Json::Value& result) |
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130 { |
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131 ExecuteInternal(1); |
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132 context_.GetJson(result, lua_gettop(context_.lua_)); |
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133 } |
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134 |
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135 |
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136 void LuaFunctionCall::ExecuteToString(std::string& result) |
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137 { |
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138 ExecuteInternal(1); |
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139 |
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140 int top = lua_gettop(context_.lua_); |
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141 if (lua_isstring(context_.lua_, top)) |
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142 { |
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143 result = lua_tostring(context_.lua_, top); |
| 1010 | 144 } |
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145 else |
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146 { |
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147 throw LuaException("The function does not return a string"); |
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148 } |
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149 } |
| 386 | 150 } |